Hi, following a previous conversation, i would like to catch MOV-TO-DRx VMI events to prevent the guest from disabling my hardware breakpoints.
@Tamas pointed me to this header: https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=xen/include/public/vm_event.h;h=b2bafc0d77f9758e42b0d53c05a7e6bb86c86686;hb=HEAD#l154 And, as far as I can tell, I have to - add a new REASON #define VM_EVENT_REASON_WRITE_DEBUGREG 15 - add a new struct struct vm_event_write_debugreg { uint32_t index; uint32_t _pad; uint64_t new_value; uint64_t old_value; }; - insert it into the vm_event_st union Can you give me more pointer and guidance how to implement this into Xen ? I have never submitted a patch, nor looked into Xen source code. Should we create a single event for MOV-TO-REGx VMI events ? It would void copy pasting and duplicating code. Thanks ! Sent with ProtonMail Secure Email. _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
